| N | 极小值 | 极大值 | 均值 | 标准差 | |
| B5 | 216 | 2 | 5 | 3.83 | 0.766 |
| B6 | 216 | 2 | 5 | 4 | 0.691 |
| B7 | 216 | 2 | 5 | 3.75 | 0.753 |
| B8 | 216 | 1 | 5 | 3.53 | 0.912 |
| 有效的N (列表状态) | 216 |